Haha, on this forum? Everybody with a machine will gladly take your money for a costume. Most people will probably do something worth your money, but for God's sake, don't spend more than 400 dollars on that one, and that's assuming you're getting the entire thing, with a styled wig and boots.
If you're just getting the jacket and pants, then you could probably cut it in half.
If you're considering a comission, there's some important questions to ask your clothier.
Ask them what their credentials are, or to see examples of their work. Most people will have examples of their work on their page, so you can usualy scan the site and get all the credentials you need.
Ask them what kinds of materials or machines they use. If someone isn't professionaly finishing seams (done with a machine called a serger), then you probably shouldn't be paying at the higher end of that 2-400 dollars. If someone's just going to throw a single straight stitch into it, it'll fall apart under stress, so don't expect it to last long.
AND FOR GOD'S SAKE, ORDER EARLY!
The number one mistake people make when they order from us at limebarb.com is they want a costume too soon, or they request it for the day they're leaving for the con. Make sure you ask for it to be delivered at least a few weeks before you'll be wearing it so you can make sure it's properly fitted and make any adjustments, or take up and issues you may have with your service.
If you want an example of some of the things you should be giving the person you're requesting from, go to our 'how to request a costume' guidelines page at http://www.limebarb.com/cosplay/howtorequest.html
and give your person every last bit of info on the page. That'll help you and them to get things going as fast as possible.
Also, shop around. Some sites, people, etc, charge way too much for very amatuer work. The people on this message board are all pretty hardcore, so you won't have that problem if you go with someone here, but at least make sure you're not paying too much or too little.
Okay, last piece of advice for requesting a costume is to go with someone you feel is capable of producing your costume at the level of quality you wish for, and don't be afraid to request from someone who doesn't seem very busy. Not everyone runs a full time costume shop like we do, and thus not all the best people are always busy. The people offering to you on this forum are some of the best, and you shouldn't be nervous about requesting from them just because they don't have a super-professional website or something. ^_^ Support the cosplay community!